So, I've been looking through some example if loops and keep seeing an operation that is confusing and I don't know what it means.
if(currentState != previousState){
What does "!=" mean???
! ( pling ) means NOT
= means equal
Together they say not equal.
Grumpy_Mike:
! ( pling )
??? You've been watching Victor Borge?
www.youtube.com/watch?v=6bpIbdZhrzA 
I just know it as an exclamation mark.
I just know it as an exclamation mark.
see:-
Thank you.
Yours is broken. It should go 'bang' not 'pling'.
"Pling"?
You mean "shriek". 
Kat you should find c/++ symbol ref card as text handy to begin 
thanks